import axios from 'axios'
import 'url-search-params-polyfill'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
import appendParam from '@/utils/append-params'

// create an axios instance
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 50000 // request timeout
})

axios.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded'

// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent
    if (config.method === 'post' && config.type !== 'form') {
      // config.headers['Content-Type'] = 'application/x-www-form-urlencoded'
      config.data = appendParam(config.data)
    }
    if (config.method === 'get') {
      config.params = {
        ...config.params,
        _t: new Date().getTime()
      }
    }
    if (store.getters.token) {
      config.headers['Authorization'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    const res = response.data

    // if the custom code is not 20000, it is judged as an error.
    if (res.code !== 200) {
      Message({
        message: res.msg || 'Error',
        type: 'error',
        duration: 5 * 1000
      })

      // 801: Illegal token; 901: Token expired;
      if (res.code === 801 || res.code === 901) {
        console.log(res.code)
        // to re-login
        MessageBox.confirm('您已下线，登录凭证失效，请重新登录', '登出提示', {
          confirmButtonText: '重新登录',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          store.dispatch('admin/resetToken').then(() => {
            window.location.reload()
          })
        }).catch(err => {
          if (err === 'cancel') { // 取消的回调 不捕获的话会报Uncaught的错
            store.dispatch('admin/resetToken').then(() => {
              window.location.reload()
            })
          }
        })
      } else {
        Message({
          message: res.msg || 'Error',
          type: 'error',
          duration: 3 * 1000
        })
      }
      return Promise.reject(new Error(res.msg || 'Error'))
    } else {
      return res
    }
  },
  error => {
    console.log('err' + error) // for debug
    Message({
      message: error.message,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)

export default service
